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Table 3 Relationships between psychosocial work characteristics in 2015 and persistent low back pain (LBP) in 2016 among participants with LBP in 2015 (n = 208)

From: Psychosocial work characteristics and low back pain in daycare (nursery) workers in Japan: a prospective cohort study

Psychosocial work characteristics in 2015

LBP prevalence in 2016

Odds ratios and 95% confidence intervals for persistent LBP

Crude

Adjusted

Model 1

Model 2

High job strain a

  Absent

81.4% (118/145)

1

1

1

  Present

91.5% (54/59)

2.47 (0.90–6.77)

2.65 (0.86–8.13)

2.48 (0.79–7.75)

Low social support b

  Absent

80.0% (76/95)

1

1

1

  Present

89.9% (98/109)

2.23 (1.00–4.96)*

2.13 (0.90–5.07)

2.43 (1.01–5.87)*

Effort-reward imbalance c

  Absent

84.0% (147/175)

1

1

1

  Present

88.2% (15/17)

1.43 (0.31–6.60)

1.27 (0.26–6.15)

1.40 (0.28–6.96)

Overcommitment d

  Absent

82.5% (113/137)

1

1

1

  Present

87.7% (57/65)

1.51 (0.64–3.58)

1.46 (0.58–3.68)

1.51 (0.58–3.93)

  1. Model 1: adjusted for age, sex, BMI, and smoking in 2015
  2. Model 2: adjusted for age, sex, BMI, smoking, regular employment, occupation, and irregular work in 2015
  3. The numbers of missing responses: a) 4, b) 4, c) 16, and d) 6
  4. *p<0.05